Question

Correct order of resistivity of materials at ${20}^{o}C$ :

• A. Conductors $\to$ Insulators $\to$ Alloys
• B. Alloys $\to$ Insulators $\to$ Conductors
• C. Alloys $\to$ Conductors $\to$ Insulators
• D. Conductors $\to$ Alloys $\to$ Insulators

Answer 1

The correct option is D Conductors $\to$ Alloys $\to$ Insulators

Conductors allow the maximum electric current to pass through them and so they have the least resistivity or most conductivity. On the other hand, an insulator does not allow the electric current to pass through it, thus it has the most resistivity. Alloys have more resistivity than the conductors but less than the insulator.

Thus correct order of resistivity is : Conductors $\to$ Alloys $\to$ Insulators